Lifetimes of antiferromagnetic magnons in two and three dimensions: experiment, theory, and numerics

Autor:	Bayrakci, S. P., Tennant, D. A., Leininger, Ph., Keller, T., Gibson, M. C. R., Wilson, S. D., Birgeneau, R. J., Keimer, B.
Rok vydání:	2013
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Other Condensed Matter
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.111.017204
Popis:	A high-resolution neutron spectroscopic technique is used to measure momentum-resolved magnon lifetimes in the prototypical two- and three-dimensional antiferromagnets Rb2MnF4 and MnF2, over the full Brillouin zone and a wide range of temperatures. We rederived theories of the lifetime resulting from magnon-magnon scattering, thereby broadening their applicability beyond asymptotically small regions of wavevector and temperature. Corresponding computations, combined with a small contribution reflecting collisions with domain boundaries, yield excellent quantitative agreement with the data. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1302.4867 Zobrazit plný text záznamu View this record from Arxiv